locking terminal for full tilt double-hung windows

Abstract

An improved locking terminal is provided for a full tilt, double-hung or single-hung window. The conventional full tilt, double-hung or single-hung window comprises a window frame having a pair of vertical jambs, each of which have a jambliner mounted therein. Each of the jambliners are provided with a pair of horizontally spaced and vertically disposed channel members which are open toward the sash sides of the window. A mechanical balance is mounted in each of the four channels and has a locking terminal associated therewith which is adapted to grip the walls of the channel to maintain the locking terminal in place in its respective channel when the sash is tilted inwardly for removal from the window frame. Each locking terminal includes a channel-shaped slide member with a back projecting from a lower end thereof and an arm projecting upwardly from the back, generally parallel to the slide member. A locking member is pivotally mounted on the back of the locking terminal for movement between an engaged position engaging a side wall of a jambliner channel, and a sliding position. The cam pivots extending from the sashes include a locking lug which is received between the walls of the channel-shaped slide member when the sash is tilted to its vertical position thereby preventing separation of the cam pivot from its locking terminal during shipment or wind loading.

I claim: 
     
       1. A locking terminal for receiving a cam pivot in full tilt, double-hung and single-hung windows, comprising: an elongated slide member having a base portion and a pair of opposing, upwardly extending side walls, said slide member having forward and rearward ends and a channel extending from the forward end to the rearward end;   a back projecting upwardly from the rearward end of the slide member and having forward and rearward faces and opposing side walls;   an arm affixed to an upper end of the back and projecting forwardly therefrom generally parallel to base portion of the slide member, said arm having an upper surface extending generally parallel to the base portion of the slide member;   a locking member pivotally mounted on the back for movement between an engaged position and a sliding position;   said locking member having a tooth which projects upwardly beyond said arm upper surface when the locking member is in the engaged position, and projects below the arm upper surface when in the sliding position.   
     
     
       2. The locking terminal of claim 1, wherein said locking member is channel-shaped, with a base portion and opposing side walls, and further comprising a pivot pin extending between said locking member side walls and journaled through a transverse aperture in the back, for pivotal movement of the locking member thereon, said locking member positioned with its base portion located forwardly of the back forward face. 
     
     
       3. The locking terminal of claim 1, wherein said arm includes a head portion formed on a forward end thereof, the head portion projecting transversely beyond sides of the arm. 
     
     
       4. In combination: a window frame having a pair of vertical jambs mounted to a surrounding wall;   each of said jambs including a vertically-extending jamb pocket for receiving a jambliner therein;   a first jambliner mounted in one of said jamb pockets, a second jambliner mounted in the other of said jamb pockets;   each of said first and second jambliners having inner and outer vertically disposed and horizontally spaced channels formed therein, each of said channels including a base wall and spaced-apart side walls;   an upper sash selectively vertically and removably mounted between said first and second jambliners adjacent said outer channels;   a lower sash selectively vertically and removably mounted between said first and second jambliners adjacent said inner channels;   a mechanical balance mounted in upper ends of each of said channels and including a cord extending downwardly therefrom in its respective channel;   a locking terminal mounted in each of said channels below an associated mechanical balance, each of said locking terminals being secured to the cord in the respective channel;   each of said locking terminals comprising:   a channel-shaped slide member including a base portion and opposing side portions, said base portion of said slide member being closely positioned to a first of said side walls of an associated jambliner channel, said side portions of said slide member extending towards a second of said side walls of the associated jambliner channel;   a back projecting from a lower end of the slide member and towards said second jambliner channel side wall;   an arm affixed to said back and projecting upwardly therefrom generally parallel to the base portion of the slide member said arm being closely position to said second jambliner channel side wall;   a locking member pivotally mounted on said back for selective engagement with said second side wall of the associated jambliner channel to lock said locking terminal in place within its channel when an upper end of an associated sash is tilted inwardly from between said jambliners;   each of said sashes having a cam pivot pin extending laterally from opposite sides thereof adjacent a lower end thereof;   said cam pivot pin adapted to engage said locking members to cause said locking member to move out of engagement with the second side wall as the upper end of the associated sash is tilted upwardly from a substantially horizontal position between said jambliners to a vertical position;   said cam pivot pin having a locking lug extending therefrom which is positioned between said side walls of said slide member channel to prevent said cam pivot pin from disengaging from said locking terminal when the associated sash is mounted between said jambliners.   
     
     
       5. The locking terminal of claim 4, wherein said locking member is channel-shaped, with a base portion and opposing side walls, and further comprising a pivot pin extending between said locking member side walls and journaled through a transverse aperture in the back, for pivotal movement of the locking member thereon, said locking member positioned with its base portion located forwardly of the back forward face. 
     
     
       6. The locking terminal of claim 4, wherein said arm includes a head portion formed on a forward end thereof, the head portion projecting transversely beyond sides of the arm. 
     
     
       7. In combination: a window frame having a pair of vertical jambs mounted to a surrounding wall;   each of said jambs including a vertically-extending jamb pocket for receiving a jambliner therein;   a first jambliner mounted in one of said jamb pockets, a second jambliner mounted in the other of said jamb pockets;   each of said first and second jambliners having inner and outer vertically disposed and horizontally spaced channels formed therein, each of said channels including a base wall and spaced-apart side walls;   an upper sash selectively vertically and removably mounted between said first and second jambliners adjacent said outer channels;   a lower sash selectively vertically and removably mounted between said first and second jambliners adjacent said inner channels;   a mechanical balance mounted in upper ends of each of said channels and including a cord extending downwardly therefrom in its respective channel;   a locking terminal mounted in each of said channels below an associated mechanical balance, each of said locking terminals being secured to the cord in the respective channel;   a channel-shaped slide member including a base portion and opposing side portions, said base portion of said slide member being closely positioned to a first of said side walls of an associated jambliner channel, said side portions of said slide member extending towards a second of said side walls of the associated jambliner channel;   a back projecting from a lower end of the slide member and towards said second jambliner channel side wall;   an arm affixed to said back and projecting upwardly therefrom generally parallel to the base portion of the slide member, said arm being closely position to said second jambliner channel side wall;   a locking member pivotally mounted on said back for selective engagement with said second side wall of the associated jambliner channel to lock said locking terminal in place within its channel when an upper end of an associated sash is tilted inwardly from between said jambliners;   each of said sashes having a cam pivot pin extending laterally from the opposite sides thereof adjacent an lower end thereof;   said cam pivot pin adapted to engage said locking terminal to cause said locking member to move out of engagement with the second side wall as the upper end of the associated sash is tilted upwardly from a substantially horizontal position between said jambliners to a vertical position;   and means on said cam pivot for preventing said cam pivot from disengaging from its associated locking terminal when the associated sash is mounted between said jambliners.